What must a driver do when passing a streetcar that is stopped to take on and let off passengers?

Answer: B — Stop and wait for the streetcar doors to close

When a driver encounters a streetcar that has stopped to take on or let off passengers, the correct action is to stop and wait for the streetcar doors to close. This is crucial for ensuring the safety of passengers who may be entering or exiting the streetcar. By stopping, drivers give passengers the opportunity to safely board or alight without the risk of being struck by a moving vehicle. Additionally, this practice is in line with the principles of safe driving in shared public transport environments. It helps prevent accidents and supports pedestrians’ rights, contributing to overall traffic safety. Observing this rule also fosters respect for public transportation systems, recognizing their importance in urban travel.